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   "metadata": {},
   "source": [
    "* 时间：2022-10-24|week10\n",
    "* 记录人：yy"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9704b6f8",
   "metadata": {},
   "source": [
    "# 本周学习目标\n",
    "> 1.while循环  \n",
    "> 2.购物车实践  "
   ]
  },
  {
   "cell_type": "markdown",
   "id": "43897a2f",
   "metadata": {},
   "source": [
    "## 1.while循环\n",
    "* 回顾—for循环：for + range（）可以指定循环次数--->关于网页URL队列的抓取实践\n",
    "* while循环：当某种条件成立时，停止循环  \n",
    "* while True：无限循环、死循环"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "f8e74de3",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hhhhhh 0\n",
      "hhhhhh 1\n",
      "hhhhhh 2\n",
      "hhhhhh 3\n",
      "hhhhhh 4\n",
      "hhhhhh 5\n",
      "hhhhhh 6\n",
      "hhhhhh 7\n",
      "hhhhhh 8\n",
      "hhhhhh 9\n"
     ]
    }
   ],
   "source": [
    "# 1.指定次数\n",
    "count = 0\n",
    "while True:\n",
    "    print(\"hhhhhh\",count)\n",
    "    count = count+1\n",
    "    if count == 10:\n",
    "        break # break终止循环"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "c5cc60b5",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "账号：admin\n",
      "密码：123456\n",
      "登录成功 ~欢迎admin\n"
     ]
    }
   ],
   "source": [
    "# 2.while True循环，可以让用户重复输入\n",
    "user01 = \"admin\"\n",
    "password01 = \"123456\"\n",
    "\n",
    "for i in range(3,0,-1):\n",
    "    username = input(\"账号：\")\n",
    "    password = input(\"密码：\")\n",
    "    #情景1：账号密码都正确\n",
    "    if user01 == username and password01 == password:\n",
    "        print(\"登录成功 ~欢迎\"+user01)\n",
    "        break # 中止循环\n",
    "    #情景2：账号不存在或密码不正确，用户可以输入三次，三次之后1个小时之后再来尝试\n",
    "    else:\n",
    "        if count <2:\n",
    "             print(\"账号不存在或者密码不正确！请重新输入！您还有\"+str(3-count)+\"次尝试的机会\") \n",
    "        else:\n",
    "            print(\"账号不存在，请1个小时后在尝试\")\n",
    "        count = count+1"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2bdfd488",
   "metadata": {},
   "source": [
    "## 2.购物车项目"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "id": "8acf2d5b",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0\n",
      "1\n",
      "2\n",
      "3\n"
     ]
    }
   ],
   "source": [
    "for i in range(4):\n",
    "    print(i)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "d1c2cb3c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "请输入余额：100\n",
      "---------------商品列表-------------\n",
      "商品序号 (0): 柠檬水 6元\n",
      "商品序号 (1): 蜜桃四季春 10元\n",
      "商品序号 (2): 芒果奶盖 12元\n",
      "商品序号 (3): 葡萄啵啵奶茶 8元\n",
      "请输入商品编号：1\n",
      "商品购买成功，正在制作中...您的余额还有90元\n",
      "---------------商品列表-------------\n",
      "商品序号 (0): 柠檬水 6元\n",
      "商品序号 (1): 蜜桃四季春 10元\n",
      "商品序号 (2): 芒果奶盖 12元\n",
      "商品序号 (3): 葡萄啵啵奶茶 8元\n",
      "请输入商品编号：2\n",
      "商品购买成功，正在制作中...您的余额还有78元\n",
      "---------------商品列表-------------\n",
      "商品序号 (0): 柠檬水 6元\n",
      "商品序号 (1): 蜜桃四季春 10元\n",
      "商品序号 (2): 芒果奶盖 12元\n",
      "商品序号 (3): 葡萄啵啵奶茶 8元\n",
      "请输入商品编号：q\n",
      "您已购买的商品： [['蜜桃四季春', 10], ['芒果奶盖', 12]]\n",
      "您的余额还有78，欢迎下次光临\n"
     ]
    }
   ],
   "source": [
    "# 1.运行程序后，让用户输入支付宝余额，然后打印我们的商品列表给用户。\n",
    "product_list = [\n",
    "    [\"柠檬水\",6],\n",
    "    [\"蜜桃四季春\",10],\n",
    "    [\"芒果奶盖\",12],\n",
    "    [\"葡萄啵啵奶茶\",8]\n",
    "]\n",
    "shopping_car = []\n",
    "AliPay = int(input(\"请输入余额：\"))\n",
    "\n",
    "while True:\n",
    "    print(\"---------------商品列表-------------\")\n",
    "    for i in range(4):\n",
    "        print(\"商品序号\",\"(\"+str(i)+\"):\",product_list[i][0],str(product_list[i][1])+\"元\")  #格式化输出\n",
    "\n",
    "    \n",
    "# 2.让用户输入商品编号进行商品的购买。（直接用商品列表的 index 作为商品编号）\n",
    "    user_choice = input(\"请输入商品编号：\")\n",
    "#情景1:用户正在购买，输入商品编号\n",
    "    if user_choice.isdigit():\n",
    "    #情景一：余额大于商品价格\n",
    "        if AliPay >= product_list[int(user_choice)][1]:\n",
    "            AliPay = AliPay - product_list[int(user_choice)][1]   \n",
    "            shopping_car.append(product_list[int(user_choice)])    \n",
    "            print(\"商品购买成功，正在制作中...您的余额还有%s元\"%(AliPay))\n",
    "    #情景二：余额小于商品价格\n",
    "        else:\n",
    "            print(\"您的余额不足，请更换支付方式\")\n",
    "#情景2:用户输入退出，结束购买\n",
    "    elif user_choice ==\"q\":\n",
    "        print(\"您已购买的商品：\",shopping_car)\n",
    "        print(\"您的余额还有%s，欢迎下次光临\"%(AliPay))\n",
    "        break"
   ]
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